Technical details of a default CentOS 6.10 minimal installation

This article is for those of you who do not want to install a whole new operating system only to discover some technical details about the default installation like, disk layout, packages included, software versions and so on. Here we are going to review in several sections what is like to have a default installation of CentOS 6.10.
Despite the old kernel, as you can see branch 2.6.x (2.6.32) it detects successfully the new RYZEN/Threadripper AMD and the system is stable (though we could not boot in UEFI mode!).

Software

The CentOS 6.10 you can have

• Xorg X server – 1.17.4
• GNOME (the GUI) – 2.28.2
• K Desktop Environment – Workspace 4.3.4
• linux kernel – 2.6.32 (2.6.32-754.el6)
• linux-firmware – no version, multiple packages for the drivers
• QT – 4.6.2
• libc – 2.12
• gnu gcc – 4.4.7
• coreutils – 8.4
• yum – 3.2.29
• cups – 1.4.2
• MySQL server – 5.1.73
• PHP – 5.3.3
• python – 2.6.6
• perl – 5.10.1
• ruby – 1.8.7.374
• OpenJDK – 1.8.0.191.b12 and also includes 1.6.0.41 and 1.7.0.191

Note: Not all of the above software comes installed by default.
Installed packages are 268 occupying 717M space:

[root@srv ~]# yum list installed|wc -l
268
[root@srv ~]# df -h /
Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/vg_srv-lv_root
                       50G  717M   46G   2% /

Security

1. Access control security policies – Selinux in Enforcing mode.

   [root@srv ~]# getenforce 
   Enforcing
   

2. Network firewall – iptables

   [root@srv ~]# iptables --version
   iptables v1.4.7
   [root@srv ~]# iptables -L -v -n
   Chain INPUT (policy ACCEPT 0 packets, 0 bytes)
    pkts bytes target     prot opt in     out     source               destination         
    5427 7228K ACCEPT     all  --  *      *       0.0.0.0/0            0.0.0.0/0           state RELATED,ESTABLISHED 
       0     0 ACCEPT     icmp --  *      *       0.0.0.0/0            0.0.0.0/0           
       8   510 ACCEPT     all  --  lo     *       0.0.0.0/0            0.0.0.0/0           
       2   120 ACCEPT     tcp  --  *      *       0.0.0.0/0            0.0.0.0/0           state NEW tcp dpt:22 
      18  2932 REJECT     all  --  *      *       0.0.0.0/0            0.0.0.0/0           reject-with icmp-host-prohibited 
   
   Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
    pkts bytes target     prot opt in     out     source               destination         
       0     0 REJECT     all  --  *      *       0.0.0.0/0            0.0.0.0/0           reject-with icmp-host-prohibited 
   
   Chain OUTPUT (policy ACCEPT 3323 packets, 379K bytes)
    pkts bytes target     prot opt in     out     source               destination